The GTM Architecture has hardened KP4 FEC support for both transmitter and receiver. It is always enabled, by default, for PAM4 mode but can also be bypassed. KP4 can not be used with NRZ mode and is always bypassed.
Figure 1. GTM Transceiver Power
The GTM Architecture has hardened KP4 FEC support for both transmitter and receiver. It is always enabled, by default, for PAM4 mode but can also be bypassed. KP4 can not be used with NRZ mode and is always bypassed.